One of the photos has a caption saying it is of 1970s rallygoers at Camp Westmar. I believe that photo is from the first rally site in Manassas. The Square Route Rally has been held at several places over its 40+ years, including Manassas, Westmar, and a site north of Baltimore when we had too many people to continue at Westmar (600+ attendees) in the 1990s.